Like many men, I am turned on by the idea of my beautiful girlfriend, Lisa, getting it on with other men. And if the mere idea of it is enough to turn me on, imagine what the reality of it does! I'm not sure exactly why I enjoy this fantasy so much. It may be because I find my girlfriend extremely sexy, and her sexuality and self-confidence is exciting to me. When other men find her incredibly sexy as well, it is an amazing turn on to watch her have them and see the pleasure she feels and the power it gives her. Unfortunately, my girlfriend doesn't share my enthusiasm for this fantasy. On occasion though, she has indulged me. This is the story of one such occasion. Lisa is beautiful, petite, with blonde hair and very attractive 36c tits. She keeps her pussy neatly trimmed, with smoothly shaved lips and just a small tuft of curly blonde pubic hair. This story begins when my good friend, Tom, was getting married and chose me to serve as best man. One of my responsibilities as best man included throwing a Stag party. The party was pretty standard: a group of guys drinking beer, playing cards and joking around while porn discs played on a DVD. I had arranged for a limo to take a group of us, including Tom of course, to a strip bar. After spending a respectable amount of time at the party, we piled into the limo and left on our journey. The strip bar was fairly uneventful and we didn't stay too long. Since we had started the festivities early, it was still fairly early when we left the strip bar. We decided to have the limo drop Tom and I off at my house, and take the rest of the crew back to their cars. When we got to my place, Lisa was wearing a T-shirt and knickers, dozing on the settee with the TV on. She didn't expect to see or hear from us, especially at such an early hour. Tom and I felt like partying more, and we convinced Lisa to join us. She changed quickly into a pair of jeans and a snug-fitting long sleeved shirt over a push-up bra, highlighting the curves of her ripe tits. We walked to a local bar with a reputation as a wild place. We ordered a round of drinks and played some pool for a while. Soon, all 3 of us were nicely pissed. The combination of the buzz, the porn DVDs, the time at the strip bar and staring at Lisa's tits had Tom and I very horny, and we were both openly flirting with her, who seemed only too happy to play along, encouraging us even more. The flirting quickly escalated. At one point I went to the bar for another round of beers. When I returned to the pool table, Tom and Lisa were kissing and Tom had both hands on Lisa's arse. I was instantly turned on! I grabbed Lisa and kissed her hard, squeezing one of her firm tits, feeling a very hard nipple. We continued our pool playing and flirting until Lisa went to the bar to buy the next round. I headed to the Gents. When I returned, Lisa was at the bar and Tom was standing behind her, this time with both arms around Lisa's slender waist and his hands up the front of her shirt, fondling her tits! He was pressed right up against her, grinding his cock against her round arse. They were laughing and obviously enjoying this unexpected encounter. It was very clear to all three of us that we were in for a very special night. We continued drinking and fooling around for a short while longer before deciding to head back to my place. Walking home, I had high expectations for the remainder of the night and, as it turned out, none of us would be disappointed. When we arrived home, we headed into the kitchen for more beers. I went into the living room to turn on some music and when I returned to the kitchen, Tom and Lisa were kissing passionately. Tom had Lisa's shirt untucked and pulled up nearly to her chin. Both of Tom's hands were feeling Lisa's tits through her lacy push-up bra. Lisa had Tom's trousers unzipped and had fished out his cock, which she was massaging with one hand. I was very pleased just enjoying the show. Neither of the lovers noticed, or at least paid any attention to, my return. As I looked on, Tom freed one of Lisa's succulent tits and moved his mouth to the firm, pink nipple. Lisa moaned with pleasure as he would flick his tongue across her nipple, then suck and nibble it, all the while mauling her other tit with his free hand. Lisa has very sensitive nipples and loves having them sucked. In fact, she loves any and all forms of attention to her tits. I could tell that the tit sucking and the excitement of the moment had Lisa on the brink of orgasm. Before she could cum, I suggested that we all move into the living room. Tom and Lisa wordlessly agreed. Tom reached both hands around Lisa and lifted her by the arse. She wrapped her legs around his waist and kissed him deeply. Tom carried Lisa down the short hallway to the living room. Once their, Tom and Lisa stripped each other's clothes off and got down on the floor, kissing and enjoying each other. Tom lay on top of Lisa, kissing her and cupping and fondling her gorgeous tits, occasionally squeezing, pinching and twisting a nipple. After a few moments of this, Tom turned his attention to Lisa's hungry cunt. Tom slid down and buried his face in Lisa's now soaked pussy. Soon, Tom could wait no longer to fuck Lisa and he climbed on top of her began rubbing his hard cock against her very wet pussy. In one hard stroke, Tom buried his stiff cock in Lisa's willing cunt, causing her to release a heavy moan. Lisa lay on her back, naked, legs spread wide while Tom alternated between long, slow thrusts and hard fast pumping. Lisa was in heaven. At one point, she opened her eyes and stared at me as Tom fucked her, smiling a delirious smile. Her eyes were full of pure, raw lust. I was so turned on by all of this! Soon, Tom's pace quickened and his muscles tightened and he shot his load, filling my girlfriend's hot pussy with his cum. When Tom rolled off of Lisa, I knew it was my turn. I quickly slipped off my clothes and slid my rock-hard cock into Lisa's very slippery pussy. She was so hot that she came as almost as soon as I got my cock in. As I was pumping in and out of my hot girlfriend's pussy, I could feel Tom's cum running out, flowing down her thigh. At first, Tom just sat on the couch watching us fuck. Soon, however, he wanted more. He moved back to the floor and kneeled next to Lisa's face, feeding her his glistening cock. She sucked hungrily at his cock as I fucked her. Here was my sexy girlfriend, one cock buried in her sizzling cunt, one in her mouth. She was insatiable. She may have been enjoying the action even more than Tom and I, if that was possible. The entire scene was too much for me and I soon came, erupting violently, adding another load of hot cum to Lisa's already dripping pussy. By now, Lisa had Tom's cock hard again. When I pulled my cock out of Lisa's pussy, Tom immediately rammed his in and began fucking her again, very slowly at first. I gently sucked one of Lisa's nipples, watching Tom fuck her. Soon, Tom increased the pace, fucking her for all he was worth. Lisa's hips bucked wildly and she cried out in orgasm. Tom announced that he was about to come and he collapsed on her naked chest seconds later. The three of us lay there motionless for a time, then went upstairs and piled into bed with Lisa lying between Tom and I. Lisa lay on her side facing Tom while he fondled and sucked her tits. Soon, I was hard again and I slipped my tender cock gently into her still wet pussy from behind. Before long, all three of us were sound asleep. This was an experience I would love to relive one day!